I’ve just had my C pillars done by a Panel beater (body shop to you fellas) and they have used body filler for it, they said that body fillers have come along way since they first came on the market apparently, fingers crossed haha.
Yeah, I was just reading up on it. The all metal fillers have aluminum in them. Apparently over time the difference in contraction and expansion between aluminum and steel can cause repairs to show back up. I'll have to do some research to find out what people are using nowadays.